The Model 52-03 discharges to atmosphere from a tee inthe pump discharge header. The valve anticipates surgescaused by power failure as well as acting as a standardoverpressure relief valve.

Pressure Relief &Surge Anticipator Valve

Typical ApplicationPump

Discharge ToAtmosphere

IsolationValve

Pressure Sensing Line

Discharge To System

Discharge ToAtmosphere

CLA-VAL52-03 Surge

Anticipator ValveCLA-VAL

81-02/681-02Check Valve

CLA-VAL61-02/661-02

Pump Control Valve

Schematic Diagram Item Description 1 100-01 Hytrol Main Valve 2 X102F Flow Limiter 3 X101 Valve Position Indicator * 4 CK2 Isolation Valve 5 100-01 Hytrol (Reverse Flow) 6 CRL-60 Pressure Relief Control 7 CRA Pressure Reducing Control 8 X58B Restriction Tube Assembly 9 CSC Swing Check Valve 10 X42N-3 Strainer Needle Valve 11 Bell Reducer 12 Pressure Gage 13 CK2 Isolation Valve 14 CK2 Isolation Valve

• Protects Against Water Hammer Surges• Opens on Initial Low Pressure Wave• Closes Slowly to Prevent Subsequent Surges• Adjustable Over a Wide Range of Settings

The Cla-Val Model 52-03 Surge Anticipator Valve is indispensable forprotecting pumps, pumping equipment and all applicable pipelines fromdangerous pressure surges caused by rapid changes of flow velocity withina pipeline.When pumping systems are started and stopped gradually, harmful surgesdo not occur. Should a power failure take place, however the abruptstopping of the pump can cause dangerous surges in the system whichcould result in severe equipment damage.Power failure to a pump will usually result in a down surge in pressure,followed by an up surge in pressure. The surge control valve opens on theinitial low pressure wave, diverting the returning high pressure wave fromthe system.*In effect, the valve has anticipated the returning high pressurewave and is open to dissipate the damage causing surge. The valve willthen close slowly without generating any further pressure surges.* An adjustable hydraulic flow control limits the valve opening for a controlled initial surge relief.

*Note: X101 or X105L Accessories not available in 4" and smaller sizes.

Notes:• The remote pressure sensing line should be 3⁄4" minimum

I.D. installed from the valve to the pipeline to avoid airpockets.

• We recommend protecting valve and tubing fromfreezing temperatures.

MODEL 52-03

Model 52-03 (Uses 100-01 Hytrol Main Valve)

Model 52-03 Dimensions (In Inches)Valve Size (Inches) 2 1⁄2 3 4 6 8 10 12 14 16 18A Threaded 11.00 12.50 — — — — — — — —AA 150 ANSI 11.00 12.00 15.00 20.00 25.38 29.75 34.00 39.00 41.38 46.00AAA 300 ANSI 11.62 13.25 15.62 21.00 26.38 31.12 35.50 40.50 43.50 47.64AAAA Grooved End 11.00 12.50 15.00 20.00 25.38 — — — — —B Diameter 8.00 9.12 11.50 15.75 20.00 23.62 28.00 32.75 35.50 41.50C Maximum 7.56 8.19 10.62 13.38 16.00 17.12 20.88 24.19 25.00 39.06CC Maximum Grooved End 6.88 7.25 9.31 12.12 14.62 — — — — —D Threaded 5.50 6.25 — — — — — — — —DD 150 ANSI 5.50 6.00 7.50 10.00 12.69 14.88 17.00 19.50 20.81 —DDD 300 ANSI 5.88 6.38 7.88 10.50 13.25 15.56 17.75 20.25 21.62 —DDDD Grooved End — 6.00 7.50 — — — — — — —E 1.69 2.06 3.19 4.31 5.31 9.25 10.75 12.62 15.50 12.95EE Grooved End 2.88 3.12 4.25 6.00 7.56 — — — — —F 150 ANSI 3.50 3.75 4.50 5.50 6.75 8.00 9.50 10.50 11.75 15.00FF 300 ANSI 3.75 4.13 5.00 6.25 7.50 8.75 10.25 11.50 12.75 15.00G Threaded 4.00 4.50 — — — — — — — —GG 150 ANSI 4.00 4.00 5.00 6.00 8.00 8.62 13.75 14.88 15.69 —GGG 300 ANSI 4.31 4.38 5.31 6.50 8.50 9.31 14.50 15.62 16.50 —GGGG Grooved End — 4.25 5.00 — — — — — — —H NPT Body Tapping 0.50 0.50 0.75 0.75 1.00 1.00 1.00 1.00 1.00 1.00J NPT Cover Center Plug 0.50 0.50 0.75 0.75 1.00 1.00 1.25 1.50 2.00 1.00K NPT Cover Tapping 0.50 0.50 0.75 0.75 1.00 1.00 1.00 1.00 1.00 1.00Stem Travel 0.70 0.80 1.10 1.70 2.30 2.80 3.40 4.00 4.50 5.10Approx. Ship Weight (lbs) 50 70 140 285 500 780 1165 1600 2265 2982Approx. X Pilot System 14 15 17 29 31 33 36 40 40 43Approx. Y Pilot System 10 11 12 20 22 24 26 29 30 32Approx. Z Pilot System 10 11 12 20 22 24 26 29 30 32

Component Standard Material CombinationsBody & Cover Ductile Iron Cast Steel Bronze

Available Sizes2-1/2" - 18"65 - 450 mm

2-1/2" - 16"65 - 400 mm

2-1/2" - 16"65 - 400 mm

Disc Retainer &Diaphragm Washer Cast Iron Cast Steel BronzeTrim: Disc Guide, Seat & Cover Bearing

Bronze is StandardStainless Steel is Optional

Disc Buna-N® RubberDiaphragm Nylon Reinforced Buna-N® RubberStem, Nut & Spring Stainless SteelFor material options not listed, consult factory.Cla-Val manufactures valves in more than 50 different alloys.

Materials

GGGG

DDDDInlet

AAAA

X

100-01Grooved

EE

CC(MAX)

K

J

H

Inlet Outlet

B (Diameter)

GGGGGG

DInletDDDDD

FFF

X

100-01Threaded &

Flanged

A

E

C(MAX)

K

J

H

Inlet Outlet

AAAAA

B (Diameter)

Valve Body & CoverPressure Class

Flanged Grooved Threaded

Grade Material ANSIStandards*

150Class

300Class

300Class

End‡Details

ASTM A536 Ductile Iron B16.42 250 400 400 400

ASTM A216-WCB Cast Steel B16.5 285 400 400 400

UNS 87850 Bronze B16.24 225 400 400 400

Note: * ANSI standards are for flange dimensions only. Flanged valves are available faced but not drilled. ‡ End Details machined to ANSI B2.1 specifications.

Valves for higher pressure are available; consult factory for details

Pressure Ratings (Recommended Maximum Pressure - psi)

Y

Z

Model 52-03 Metric Dimensions (Uses 100-01 Hytrol Main Valve)

Model 52-03 Dimensions (In mm)Valve Size (mm) 65 80 100 150 200 250 300 350 400 450A Threaded 279 318 — — — — — — — —AA 150 ANSI 279 305 381 508 645 756 864 991 1051 1168AAA 300 ANSI 295 337 397 533 670 790 902 1029 1105 1210AAAA Grooved End 279 318 381 508 645 — — — — —B Diameter 203 232 292 400 508 600 711 832 902 1054C Maximum 192 208 270 340 406 435 530 614 635 992CC Maximum Grooved End 175 184 236 308 371 — — — — —D Threaded 140 159 — — — — — — — —DD 150 ANSI 140 152 191 254 322 378 432 495 528 —DDD 300 ANSI 149 162 200 267 337 395 451 514 549 —DDDD Grooved End — 152 191 — — — — — — —E 43 52 81 110 135 235 273 321 394 329EE Grooved End 73 79 108 152 192 — — — — —F 150 ANSI 89 95 114 140 171 203 241 267 298 381FF 300 ANSI 95 105 127 159 191 222 260 292 324 381G Threaded 102 114 — — — — — — — —GG 150 ANSI 102 102 127 152 203 219 349 378 399 —GGG 300 ANSI 110 111 135 165 216 236 368 397 419 —GGGG Grooved End — 108 127 — — — — — — —H NPT Body Tapping 0.50 0.50 0.75 0.75 1.00 1.00 1.00 1.00 1.00 1.00J NPT Cover Center Plug 0.50 0.50 0.75 0.75 1.00 1.00 1.25 1.50 2.00 1.00K NPT Cover Tapping 0.50 0.50 0.75 0.75 1.00 1.00 1.00 1.00 1.00 1.00Stem Travel 18 20 28 43 58 71 86 102 114 130Approx. Ship Weight (kgs) 23 32 64 129 227 354 528 726 1027 1353Approx. X Pilot System 356 381 432 737 788 839 915 1016 1016 1093Approx. Y Pilot System 254 280 305 508 559 610 661 737 762 813Approx. Z Pilot System 254 280 305 508 559 610 661 737 762 813

GGGG

DDDDInlet

AAAA

X

100-01Grooved

EE

CC(MAX)

K

J

H

Inlet Outlet

B (Diameter)

YZ

GGGGGG

DInletDDDDD

FFF

X

100-01Threaded &

Flanged

A

E

C(MAX)

K

J

H

Inlet Outlet

AAAAA

B (Diameter)

Surge View Analysis Overview“SurgeView” is available as a service to specifying engineers to aid in theselection the best Cla-Val products to prevent and relieve surges.

The software plots the results of the transient in real time and “animates”the transient waves over the period of the transient event.

Learn more at: www.cla-val.com/engineering-resources.php

Model 100-01 FullPort Hytrol Main Valve

CLA-VAL 1701 Placentia Ave • Costa Mesa CA 92627 • Phone: 949-722-4800 • Fax: 949-548-5441 • E-mail: info@cla-val.com • www.cla-val.com Copyright Cla-Val 2021 • Printed in USA • Specifications subject to change without notice.© E-52-03 (R-02/2021)

Sizing Information: Because of the many variable conditions that generally exist in any given system, proper sizing is important. Incorrect valve sizing will nullifythe ability of the Surge Anticipator Valve. For valve sizing assistance, contact Cla-Val with the following specific pump and system information: number and type ofpumps; shutoff head; flow rate; discharge static head and pumping head; pipe size; length; thickness and material.

52-03Valve

Selection

100-01 Pattern: Globe (G), Angle (A), End Connections: Threaded (T), Grooved (GR), Flanged (F) Indicate Available Sizes

Inches 21⁄2 3 4 6 8 10 12 14 16 18

mm 65 80 100 150 200 250 300 350 400 450

Basic Valve100-01

Pattern G, A G, A G, A G, A G, A G, A G, A G, A G, A G

End Detail T, F,Gr*

T, F,Gr

F, Gr

F, Gr*

F, Gr* F F F F F

Suggested Flow (gpm)

Maximum 300 460 800 1800 3100 4900 7000 8400 11000 14000

Maximum Surge 670 1000 1800 4000 7000 11000 16000 19000 25000 31000

Suggested Flow

(Liters/Sec)

Maximum 19 29 50 113 195 309 442 530 694 883

Maximum Surge 42 63 113 252 441 693 1008 1197 1577 1956

100-01 Series is the full internal port Hytrol. *Globe Grooved Only

Temperature Range Water: to 180°FMaterialsStandard Pilot System Materials Pilot Control: Low Lead Bronze Trim: Stainless Steel 303 Rubber: Buna-N® Synthetic RubberOptional Pilot System Materials

Pilot systems are available with optionalAluminum, Stainless Steel or Monel materials.

Adjustment RangesHigh Pressure Pilot (CRL-60)

0 to 75 psi 20 to 200 psi * 100 to 300 psi 250 to 600 psiLow Pressure Pilot (CRA)

2 to 30 psi 15 to 75 psi 30 to 300 psi *

*Supplied unless otherwise specifiedOther ranges available, please consult factoryCRL-60 Pilot Control

CRA Pilot ControlAutomatically reduces a higher inlet pressure to a lower outletpressure. Direct acting, spring

loaded, diaphragm type - hydraulicor pneumatic operation.

Direct-acting, spring loaded,diaphragm type relief pilot capableof opening and closing within very

close pressure limits.

When Ordering, Specify: 1. Catalog No. 52-03 2. Valve Size 3. Pattern - Globe or Angle 4. Pressure Class 5. Threaded or Flanged 6. Trim Material 7. Adjustment Range 8. Desired Options 9. When Vertically Installed

Valve Options

X141 PressureGauge

X101AR ValvePosition Indicatorwith Air Release

X144 e-FlowMeter

X43HStrainer

StainlessSteel Pilot

X101 Valve Position

Indicator